I suppose it’s some consolation to remember that the things we do to stay slender are also good for the health of our brains. After all, the best way to tackle weight gain is to exercise regularly and eat a nutritious diet with the emphasis on fresh fruit and veggies and wholegrains – and cut out the junk. Both of these measures are also good for brain health and psychological wellbeing, so we can look after our minds and our bodies, all at the same time.